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01 Record

CVE-2026-95665

MISP Reflected Cross-Site Scripting in Event Export Confirmation Form via Unescaped JSON

MediumPUBLISHEDCNA: CIRCL
CNA base score5.1 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

02 Description

MISP Reflected Cross-Site Scripting in Event Export Confirmation Form via Unescaped JSON

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.54% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 45.2% of scored records. A rank, not a probability.
NVD base score
5.1 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD analysis status
Deferred. NVD last modified this record on 2026-09-22.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-09-22 13:01Z1 MO AGO
Last updated
2026-09-22 15:33Z1 MO AGO
Reserved
2026-09-22
Assigning CNA
CIRCL
Record state
PUBLISHED
Severity
Medium (CVSS 5.1)
CNA CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Weaknesses
  • CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base
Data version
5.2
Document digest
698c910b6da7c11497eb77553340e6e790cb2040143b8004b05ff0c48f02cc81

05 Affected products

VendorProductVersionsPlatforms
MISPMISP0 to < 2.5.47—

06 References

07 Remediation

The vulnerability is remediated by adding the JSON_HEX_TAG, JSON_HEX_APOS, JSON_HEX_QUOT, and JSON_HEX_AMP flags to the json_encode() call at the rendering sink. These flags cause angle brackets, single quotes, double quotes, and ampersands to be hex-encoded (e.g., ' becomes \u0027), preventing any of these characters from breaking out of the single-quoted JavaScript string literal and thereby eliminating the script injection vector.